Switching device

Claims

1. An electromagnetic actuator having a movable iron core that constitutes an internal space and a fixed iron core disposed within the internal space, Fixed electrodes and A movable electrode that moves in conjunction with the aforementioned movable iron core, The system comprises an arc extinguishing chamber housing the movable electrode and the fixed electrode, The electromagnetic actuator controls the electrical connection between the fixed electrode and the movable electrode by moving the movable electrode. The electromagnetic actuator is disposed in the internal space between the movable core and the fixed core, and has a coil wound around either the movable core or the fixed core, The coil moves together with the movable iron core in an opening and closing device.

2. The aforementioned movable iron core is A first portion extending along a first direction parallel to the central axis of the coil, A second portion that is spaced apart from the first portion and extends along the first direction, It has connecting parts connected to each of the first and second parts, The coil is provided between the first portion and the second portion, The opening and closing device according to claim 1, wherein, when viewed in the first direction, the width of the movable core in a direction perpendicular to the direction from the first portion to the second portion is greater than or equal to the inner diameter of the coil.

3. The electromagnetic actuator further comprises an additional core that moves together with the movable core, The opening and closing device according to claim 1 or claim 2, wherein the additional core is surrounded by the coil and provided between the fixed core and the movable core.

4. The coil is wound around the fixed iron core, The aforementioned movable iron core is A third portion having an outer periphery and a bottom portion connected to the outer periphery, It has a fourth part that is separate from the third part and attached to the outer periphery, The fourth portion is provided opposite the bottom portion with respect to the outer periphery, The outer periphery surrounds the coil, as described in claim 1.

5. The electromagnetic actuator further comprises a cover that covers the movable core and the coil and moves together with the movable core, The cover is provided with an opening, The opening and closing device according to claim 1 or claim 2, wherein the fixed iron core is arranged in the opening.

6. The electromagnetic actuator further comprises a spring provided between the fixed iron core and the cover, The opening and closing device according to claim 5, wherein the spring applies an elastic force to the cover in the direction opposite to the direction in which the movable iron core moves when current is supplied to the coil.

7. The electromagnetic actuator is The coil wire drawn from the aforementioned coil, The coil wire is electrically connected to the lead wire, and the lead wire is provided outside the internal space, The switchgear according to claim 1 or claim 2, wherein the lead wire has greater flexibility than the coil wire.

8. The aforementioned leader wire has multiple leader wire sections, The coil wire is fixed to the movable iron core, The switching device according to claim 7, wherein the coil wire is electrically connected to each of the plurality of lead wire sections.